SEISMIC SCREENING OF BRIDGES IN NEW ZEALAND

SUMMARY New Zealand’s stock of road bridges includes numerous structures that were designed before current seismic design procedures were introduced. Some of these structures, in particular, need to be assessed for possible seismic retrofitting. This paper describes a screening procedure that is being implemented to review all the state highway bridge stock, and to identify and prioritise, at acceptable cost, those structures that justify more detailed seismic analysis and assessment.